全文获取类型
收费全文 | 832篇 |
免费 | 60篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 44篇 |
妇产科学 | 4篇 |
基础医学 | 99篇 |
口腔科学 | 18篇 |
临床医学 | 119篇 |
内科学 | 166篇 |
皮肤病学 | 21篇 |
神经病学 | 48篇 |
特种医学 | 121篇 |
外科学 | 97篇 |
综合类 | 15篇 |
预防医学 | 47篇 |
眼科学 | 6篇 |
药学 | 41篇 |
肿瘤学 | 63篇 |
出版年
2023年 | 7篇 |
2022年 | 5篇 |
2021年 | 21篇 |
2020年 | 9篇 |
2019年 | 12篇 |
2018年 | 9篇 |
2017年 | 7篇 |
2016年 | 14篇 |
2015年 | 15篇 |
2014年 | 14篇 |
2013年 | 25篇 |
2012年 | 23篇 |
2011年 | 27篇 |
2010年 | 39篇 |
2009年 | 48篇 |
2008年 | 22篇 |
2007年 | 32篇 |
2006年 | 31篇 |
2005年 | 23篇 |
2004年 | 23篇 |
2003年 | 13篇 |
2002年 | 15篇 |
2001年 | 19篇 |
2000年 | 7篇 |
1999年 | 16篇 |
1998年 | 37篇 |
1997年 | 40篇 |
1996年 | 31篇 |
1995年 | 34篇 |
1994年 | 22篇 |
1993年 | 22篇 |
1992年 | 18篇 |
1991年 | 8篇 |
1990年 | 19篇 |
1989年 | 25篇 |
1988年 | 28篇 |
1987年 | 24篇 |
1986年 | 22篇 |
1985年 | 18篇 |
1984年 | 7篇 |
1983年 | 10篇 |
1982年 | 13篇 |
1981年 | 6篇 |
1980年 | 10篇 |
1978年 | 9篇 |
1977年 | 10篇 |
1976年 | 7篇 |
1975年 | 5篇 |
1972年 | 3篇 |
1941年 | 2篇 |
排序方式: 共有913条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
Identifying alcoholism in medical patients 总被引:1,自引:0,他引:1
6.
Kinnison ML; Perler BA; Kaufman SL; Mitchell SE; Kadir S; Williams GM; White RI Jr 《Radiology》1986,160(3):727-730
In situ saphenous vein grafts are being used with increasing frequency for bypass procedures involving the femoral and popliteal arteries. Complications of these procedures include anastomotic stenoses and persistent arteriovenous fistulae that may result in failure of the graft. Balloon angioplasty and embolotherapy with detachable balloons were employed successfully in three or four recent cases of patients with complications from in situ grafts. Tailored angiography is essential for evaluating in situ grafts, and interventional techniques are extremely useful for managing complications. 相似文献
7.
Breast-feeding has numerous advantages, yet the trend to breast-feed is declining. Nurses, as well as patients, can benefit from increasing their knowledge base about breast-feeding. Nurses have an important role to play in supporting breast-feeding mothers with current research-based knowledge. More importantly, nurses also serve as patient advocates for the neonate. The use of appropriate nursing diagnoses may facilitate an optimal breast-feeding experience for our smallest consumer, the neonate. 相似文献
8.
Polycystic kidney disease is an autosomal dominant disease that may be associated with cystic disease of the liver. In women, the cysts may develop early and be more troublesome than in men. Cystadenocarcinoma of the pancreas is uncommon, comprising 1% of primary pancreatic malignancies. This case report is the first to describe a familial association between polycystic kidney disease and cystadenocarcinoma of the pancreas and liver in the English medical literature. A patient with autosomal dominant polycystic kidney disease (ADPKD) and multiple hepatic cysts developed cystadenocarcinoma of the pancreas with multiple malignant liver cysts. The patient's mother, sister, and niece had ADPKD, and the patient's sister also died of pancreatic cystadenocarcinoma. We believe that the development of these two disease entities in which the primary pathology is cyst formation has a genetic association. (Gastroenterology 1997 Jun;112(6):2104-7) 相似文献
9.
Pheochromocytoma and paraganglioma: comparison of MR imaging with CT and I-131 MIBG scintigraphy 总被引:6,自引:0,他引:6
To ascertain the magnetic resonance (MR) imaging characteristics of pheochromocytomas and paragangliomas and to compare MR with computed tomography (CT) and iodine-131 metaiodobenzylguanidine (I-131 MIBG), 19 patients (18 with pheochromocytomas, one with a paraganglioma) were studied. The 18 patients with pheochromocytomas had had positive findings with I-131 MIBG scintigraphy. Abdominal pheochromocytomas were generally hypointense compared with normal liver on T1-weighted MR images and extremely hyperintense on T2-weighted MR images. MR imaging was preferable to CT in the evaluation of primary pheochromocytomas due to superior tissue characterization, particularly in the patient with hypertension and borderline catecholamine levels. For patients with recurrent or metastatic disease, the data suggest that I-131 MIBG scintigraphy is the examination of choice. 相似文献
10.
Influence of posture on hepatic perfusion and the presystemic biotransformation of propranolol: simulation of the food effect 总被引:2,自引:0,他引:2
Several research groups have reported that the oral administration of propranolol with protein-rich food leads to a marked increase (mean + 60%) in the area under the drug plasma concentration-time curve (AUC oral) of this highly metabolized and well-absorbed drug. It has been postulated that this "food effect" is caused at least in part by a transient increase in hepatic blood flow (QH) with its associated decrease in first-pass metabolism (hepatic extraction is a monotonic decreasing function of QH). A randomized crossover study using postural manipulations to produce changes in QH of the magnitude observed after food consumption (20% to 50%) was performed in an attempt to isolate the contribution of transient changes in QH to the food effect phenomenon. A solution of 80 mg propranolol HCl was taken orally and subjects were randomly assigned to postural manipulation protocols that should change QH such that AUC oral would be minimized (phase 1) or maximized (phase 2). Estimated QH (indocyanine green total body clearance from blood) was determined before and at three time points during each phase. It was observed that indocyanine green total body clearance during periods of standing was 15% to 40% below that observed during periods of seating (significant at p less than 0.05 for many of the appropriate comparisons). However, AUC oral for propranolol was not affected (mean +/- 1 SD; AUC phase 2/AUC phase 1+= 0.98 +/- 0.28) by these changes in QH, which are comparable to those encountered after food consumption.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献